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Patent Issued for Glass Substrates Having Carbon Nanotubes Grown Thereon and Methods for Production

August 6, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Malet, Brandon K. (Baltimore, MD); Shah, Tushar K. (Fulton, MD), filed on September 12, 2011, was published online on July 22, 2014.

The patent's assignee for patent number 8784937 is Applied NanoStructured Solutions, LLC (Baltimore, MD).

News editors obtained the following quote from the background information supplied by the inventors: "Carbon nanotubes have been proposed to have utility in a number of applications due to their large effective surface area, mechanical strength, and thermal and electrical conductivity. Many of these applications are particularly well suited for carbon nanotubes grown on glass substrates (e.g., glass fiber composite materials).

"In order to synthesize carbon nanotubes, a catalyst is generally needed to mediate carbon nanotube growth. Most often the catalyst is a metal nanoparticle, particularly a zero-valent transition metal nanoparticle. A number of methods for synthesizing carbon nanotubes are known in the art including, for example, micro-cavity, thermal- or plasma-enhanced chemical vapor deposition (CVD), laser ablation, arc discharge, flame synthesis, and high pressure carbon monoxide (HiPCO) techniques. Generally, such methods for synthesizing carbon nanotubes involve generating reactive gas phase carbon species under conditions suitable for carbon nanotube growth.

"Synthesis of carbon nanotubes on solid substrates, including glass substrates, can be carried out using many of these techniques. However, carbon nanotube growth rates on glass substrates have heretofore been insufficient to facilitate high throughput syntheses in continuous processes. As a result of this difficulty, undesirably short carbon nanotubes can be produced or undesirably slow process line speeds can be required.

"In view of the foregoing, processes for growing carbon nanotubes on glass substrates at high growth rates would be of substantial benefit in the art. The present disclosure satisfies this need and provides related advantages as well."

As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "In various embodiments, carbon nanotube growth processes are described herein. In some embodiments, the carbon nanotube growth processes include depositing a catalytic material on a glass substrate, depositing a non-catalytic material on the glass substrate, and after depositing the catalytic material and the non-catalytic material, exposing the glass substrate to carbon nanotube growth conditions so as to grow carbon nanotubes thereon.

"In some embodiments, the carbon nanotube growth processes include depositing a catalyst precursor on a glass fiber substrate, depositing a non-catalytic material on the glass fiber substrate, converting the catalyst precursor into a catalyst that is operable for forming carbon nanotubes when exposed to carbon nanotube growth conditions, and exposing the glass fiber substrate to carbon nanotube growth conditions while the glass fiber substrate is being transported so as to grow carbon nanotubes thereon.

"In some embodiments, the carbon nanotube growth processes include allowing a solution containing water, hydrogen peroxide, an iron (II) salt or a hydrate thereof, and a cobalt (II) salt or a hydrate thereof to form a catalyst precursor in the solution; depositing the catalyst precursor on a glass fiber substrate; depositing a non-catalytic material on the glass fiber substrate; converting the catalyst precursor into a catalyst that is operable for forming carbon nanotubes upon exposure to carbon nanotube growth conditions; and exposing the glass fiber substrate to carbon nanotube growth conditions so as to grow carbon nanotubes thereon.

"In some embodiments, glass fiber substrates containing carbon nanotubes grown thereon can be produced by the carbon nanotube growth processes described herein.

"The foregoing has outlined rather broadly the features of the present disclosure in order that the detailed description that follows can be better understood. Additional features and advantages of the disclosure will be described hereinafter, which form the subject of the claims."

For additional information on this patent, see: Malet, Brandon K.; Shah, Tushar K.. Glass Substrates Having Carbon Nanotubes Grown Thereon and Methods for Production. U.S. Patent Number 8784937, filed September 12, 2011, and published online on July 22, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8784937.PN.&OS=PN/8784937RS=PN/8784937

Keywords for this news article include: Fullerenes, Nanotechnology, Carbon Nanotubes, Emerging Technologies, Applied NanoStructured Solutions LLC.

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Source: Journal of Engineering


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